Authorities said the children’s mother — identified as Marina Krim — was holding her 3-year-old daughter when she found her two other children, 6-year-old Lulu and 2-year-old Leo, stabbed to death in a bathtub.

Sources told CBS 2 the computer-generated note referenced Beltway sniper Lee Boyd Malvo being let out of prison and threatening that a pregnant girl will die every week if Malvo is not freed from jail.

The victim, identified as David Villalobos of Putnam County, suffered puncture wounds to his back and sustained a broken ankle and broken arm in the incident, police said. The NYPD originally indicated Villalobos had lost a leg.